Deflating Seats or Backrests

First of all, make sure that the inflation valve is in correctly and properly tightened up.  

To locate the puncture or air leak it is best to apply diluted washing up liquid from a spray bottle to the surface of the seats or backrest and around the inflation valves.

Bubbles should appear where the puncture is located. To fix the puncture you will require a repair kit which should include a waterproof repair patch and epoxy vinyl glue.